Bug: Inaccurate ETA & ETE

Below is an example of the intermittently inaccurate ETAs and ETEs my 965 reports while navigating.

While hiking a couple weekends ago, I was told I would reach a destination 0.49 miles away in 1:28 min, a pace of 3 min/mile. Not only can I not run that fast, but I surely was not hiking at that pace! I'm also not sure my ultimate destination was even 0.49 miles away...